condition	mean	min	max
4 h after light	18.974964	16.460802	21.489126
8 h after light	17.8495345	15.507338	20.191731
12 h after light	14.7541655	11.403916	18.104415
4 h after dark	14.7175785	14.515109	14.920048
8 h after dark	13.996226	11.5103	16.482152
12 h after dark	12.659946	12.659946	12.659946